Yamaha NAVIGO User manual

NAVIGO OWNER’S MANUAL
©2021 by Yamaha Motor Corporation, U.S.A.
December 2021
All rights reserved.
Any reprinting or unauthorized use without the written permission
of Yamaha Motor Corporation, U.S.A. is expressly prohibited.
Printed in Japan.
OWNER’S MANUAL
X0F-28199-B2
Wheelchair Power Add-on Kits
READ THIS MANUAL CAREFULLY!
It contains important safety information.

WARNING:
This
product can expose you to
chemicals including phthalates
and lead which are known to the
State of California to cause
cancer and birth defects or other
reproductive harm. For more
information go to
www.P65Warnings.ca.gov
CAUTION:
Federal
law restricts this device to sale
by or on the order of a
practitioner licensed by the law
of the State in which he/she
practices.

Table of Contents
1. Please Read Before Use 1
1.1. Foreword 1
1.2. Symbols Used in This Manual 2
1.3. Operation Diagnosis Check 3
1.4. Assistive Operation Diagnosis Check 4
1.5. Warnings and Notes for the Operation 4
1.6. Warning Label Location Diagram 22
2. Names of Parts 26
2.1. NAVIGO24″ 26
2.2. NAVIGO16″ 27
2.3. Controller 28
2.4. Assistant Controller (Optional) 28
2.5. Nickel Metal Hydride Battery (JWB2) 29
2.6. Lithium Ion Battery (ESB1) 30
2.7. ChargerforLithiumIonandNickelMetalHydride
Battery (ESC3) 31
3. Before Sitting in the Wheelchair 32
3.1. Inspecting the Wheelchair 32
3.2. Checking Your Clothing 36
3.3. Checking the Residual Capacity of the Battery
and Installing the Battery on the Wheelchair 36
4. Riding the Wheelchair 38
4.1. Sitting in the Wheelchair 38
4.2. Moving the Wheelchair 40
4.3. AdjustingandConrmingtheMaximumSpeed 42
4.4. Checking the Residual Capacity of the Battery
during Operation 43
4.5. Anti Theft Function 44
4.6. Other Functions 45
4.7. PracticingBasicOperations 46

5. After You are Finished Riding the Wheelchair 48
5.1. Getting Out of the Wheelchair 48
5.2. Removing the Battery 49
6. How to Use the Assistant Controller 50
6.1. Getting in the Wheelchair 50
6.2. Starting Assistant Travel Mode 50
6.3. After Assistant Operations are Finished 53
7. HandlingtheBatteriesandChargers 54
7.1. TypesofBatteries 54
8. Nickel Metal Hydride Battery and Charger 59
8.1. Features of the Nickel Metal Hydride Battery (JWB2) 59
8.2.
How to Use the Nickel Metal Hydride Battery (JWB2) 59
8.3. Characteristics and Handling of the Nickel Metal
Hydride Battery (JWB2) 61
8.4. How to Charge the Nickel Metal Hydride Battery
(JWB2) 63
8.5. Refresh Charging the Nickel Metal Hydride
Battery(JWB2) 67
8.6. Charger (ESC3) Indicator Lamps 68
9. LithiumIonBatteryandCharger 70
9.1. FeaturesoftheLithiumIonBattery(ESB1) 70
9.2. HowtoUsetheLithiumIonBattery(ESB1) 70
9.3. Characteristics and Handling of the Lithium Ion
Battery(ESB1) 72
9.4. HowtoChargetheLithiumIonBattery(ESB1) 75
9.5. The Temperature of the Lithium Ion Battery
(ESB1)duringCharging 79
9.6. Charger (ESC3) Indicator Lamps 80

10. Wheelchair Transporting and Storing Instructions 81
10.1. Loading the Wheelchair in a Car 81
10.2. Unloading the Wheelchair from a Car 83
10.3. Storing the Wheelchair 84
10.4. Boarding an Airplane 85
11. Wheelchair Disassembly and Adjustment 86
11.1. Removing and Installing the Unit 86
11.2. How to Remove and Install the Battery Bag 90
11.3. Anti-tip Device 93
11.4. Controller Holder 96
11.5. Assistant Controller (Optional) 102
11.6. Clutch Levers 102
11.7.ParameterSettings 102
11.8. Smart Tune Settings 104
12. Maintenance, Daily Check, Periodic Inspection 106
12.1.Maintenance 107
12.2. Daily Checks 109
12.3. End of NAVIGO Use Recycling 109
13. DimensionsandSpecications 110
14. Troubleshooting, Repairs, Warranty 112
14.1. Before Requesting Repairs 112
14.2. Requesting Repairs and Inspections 116
14.3. Serial Number Location 116
14.4.WarrantyStatement 117

Introduction
This is a manual for the “NAVIGO” electric power unit for wheelchairs. Before you read this manual, check
which product you are using.
This product consists of the left and right drive units, the joystick-equipped controller, the battery, optional
battery bag, the battery charger, and the optional assistant controller. These components, except for the
battery and charger, are already installed to the wheelchair frame. For the initial use, the customer does
not have to use tools, and so on, to assemble the wheelchair. Refer to “2. Names of Parts” to ensure that
these components are installed to the wheelchair that you purchased and that the battery and charger
are included. If you visually notice that any of these components are not installed, are not included, or are
damaged before using the wheelchair, immediately contact the dealer without using the wheelchair.
NAVIGO24″ NAVIGO16″
For information for operating the wheelchair frame and warranty for the frame with which you are using
the NAVIGO, see the frame manual.
WARNING
● ReadandunderstandthismanualcompletelybeforeoperatingyourNAVIGOproduct.This
manual should be considered a permanent part of your product and should remain with it.

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1. Please Read Before Use
1.1. Foreword
Thank you for purchasing the NAVIGO.
Indication for use: The device NAVIGO is a Powered Wheelchair Conversion Kit and suitable for a dis-
abled person who cannot walk or has restrictions on walking. It is intended for medical purposes to pro-
vide a means for a disabled person to take over the propulsion of the wheelchair and increase mobility
and exibility. Generally speaking, riding in a wheelchair incurs the possible risk of personal injury or dam-
age to the wheelchair from improper use. Depending on the type or extent of the disabilities of the user, it
might be dangerous to travel unaccompanied.
Before using the wheelchair, be sure that not only the user, but also the assistant and controller, has read
this manual to assure full understanding.
(1) The wheelchairs on which the NAVIGO has been installed are wheelchairs for physically handi-
capped people, and legal status of someone in a wheelchair is that of a pedestrian. Make sure to ad-
here to the tra󰀩c rules and manners of a pedestrian.
(2) The NAVIGO 24″ withstands a load of 275 lb (125 kg). Use with a total maximum load including the
chair frame weight of 275 lb (125 kg). NAVIGO 16″ withstands a load of 220 lb (100 kg). Use with a
maximum load included the chair frame weight of 220 lb (100 kg). If the frame on which the NAVIGO
is installed has an even lighter load capacity, ensure that you do not exceed that value.
(3) To help ensure safe use, warning labels are a󰀩xed to this product. Make sure to adhere to the warn-
ing labels. Refer to “1.6. Warning Label Location Diagram” for the locations of the warning labels.
(4) Do not use this product for any purpose other than as an electric wheelchair.
(5) Some of the illustrations in this manual are images of general electric wheelchairs. The actual prod-
uct may be di󰀨erent than that shown.

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This is the safety alert symbol. It is used to alert you to potential
personal injury hazards. Obey all safety messages that follow
this symbol to avoid possible injury or death.
A WARNING indicates a hazardous situation which, if not avoid-
ed, could result in death or serious injury.
A CAUTION indicates a potentially hazardous situation which, if
not avoided, may result in minor or moderate injury to the user
or damage to the product or other property.
WARNING
CAUTION
A NOTICE indicates special precautions that must be taken to
avoid damage to the product or other property.
NOTICE
Indicates things you must not do.
A TIP provides key information to make procedures easier or
clearer.
TIP
1.2. Symbols Used in This Manual

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WARNING
● Beforeusingthewheelchair,besuretoassessyourcompetenceanddeterminewhetheror
not you need an assistant.
 Moreover,indeterminingthenecessityofanassistant,consultexpertopinionsasapointof
reference.
If your judgment is based solely on your own opinion, you or other people around you may
get injured.
Can operate
all items.
Have trouble
operating one
or both.
Use this product by having an as-
sistant provide assistive operation.
You can travel unaccompanied. For your safety, remember to travel carefully.
In situations such as those mentioned in the warnings in “1.5. Warnings and Notes for the Operation”,
be sure to have an assistant accompany you, and pay su󰀩cient attention to safety while traveling.
1.3. Operation Diagnosis Check
Depending on the extent of your disabilities, it may be dangerous to travel unaccompanied. Use this diag-
nosis check as a guide to determine whether or not you can travel unaccompanied.
(1) Are you able to move the switches on the controller at your own will?
(2) Are you able to tilt the joystick forward slowly and move smoothly?
(3) Are you able to move the joystick back to original position?
(4) Are you able to tilt the joystick in the direction you want to go?
(5) Are you able to correctly perceive visually the conditions of the
road surface and your surroundings, and avoid dangerous areas?
Diagnosis Check

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1.4. Assistive Operation Diagnosis Check
Use the diagnosis check below as a guide to determine whether or not you can provide assistive
operation.
If you feel uncomfortable with any of the 3 tasks below, do not provide assistive operation.
(1) Are you able to correctly perceive the conditions of the road surface and your surroundings,
and avoid dangerous areas?
(2) Are you able to assist the user to get on and o󰀨 the wheelchair, and to replace the battery?
(3) Are you able to provide assistive operation on a manual wheelchair?
Diagnosis Check
WARNING
● Ifanassistantistoaccompanyyouandoperatethewheelchair,besuretoassesshisorher
competence.
 Moreover,whenassessingtheassistant’scompetence,consultexpertopinionsasapoint
of reference.
If your judgment is based solely on your own opinion, you or other people around you may
get injured.
● Ifyoulackthecompetencetoprovideassistiveoperation,donotattempttoprovideit.
1.5. Warnings and Notes for the Operation
Please read this manual before using the product.
Please read this manual carefully to ensure safe and comfortable operation. After reading it, store it where
it can be accessed easily for future reference.
Unless specically noted, the following information applies to when the user is operating the wheelchair
themselves and when an assistant is operating the wheelchair using the assistant operations.
1.5.1. Before Using the Wheelchair After Purchasing the Unit
WARNING
● Beforeusingthewheelchair,besuretoassessyourcompetenceanddeterminewhetheror
not you need an assistant.
 Moreover,indeterminingthenecessityofanassistant,consultexpertopinionsasapoint
of reference.
If your judgment is based solely on your own opinion, you or other people around you may
get injured.
● Practicetravelingonalevelandsafeareawithanassistantaccompanyingyou,untilyou
are comfortable with the operation. If you go on public roads while still unfamiliar with the
operation, you or other people around you may get injured.

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1.5.2. Powered Wheelchair Electromagnetic Interference (EMI)
Because EM energy rapidly becomes more intense as one moves closer to the transmitting antenna
(source), the EM elds from hand-held radio wave sources (transceivers) are of special concern. It is pos-
sible to unintentionally bring high levels of EM energy very close to the powered wheelchair’s control sys-
tem while using these devices. This can a󰀨ect powered wheelchair movement and braking. Therefore, the
warnings listed below are recommended to prevent possible interference with the control system of the
powered wheelchair.
2) Be aware of nearby transmitters, such as radio or TV stations, and try to avoid coming
close to them;
4) Be aware that adding accessories or components, or modifying the powered wheelchair,
may make it more susceptible to EMI (Note: There is no easy way to evaluate their effect on
the overall immunity of the powered wheelchair); and
5) Report all incidents of unintended movement or brake release to the powered wheelchair
manufacturer or distributor, and note whether there is a source of EMI nearby.
Electromagnetic interference (EMI) from sources such as radio and TV stations, amateur radio
(HAM)transmitters,two-wayradios,andcellularphonescana󰀨ectpoweredwheelchairsand
motorized scooters. Following the warnings listed below should reduce the chance of unin-
tended brake release or powered wheelchair movement which could result in serious injury
1) Do not operate hand-held transceivers (transmitters - receivers), such as citizens band (CB)
radios, or turn ON personal communication devices, such as cellular phones, while the
powered wheelchair is turned ON;
3) If unintended movement or brake release occurs, turn the powered wheelchair OFF as soon
as it is safe;
WARNING
Important Information
1) 20 volts per meter (V/m) is a generally achievable and useful immunity level against EMI (as of May
1994) (the higher the level, the greater the protection).
2) This product has an immunity level of 20 V/m.*
*) And it has an emission level of CISPR 11 Group 1 Class B.

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CAUTION
IT IS VERY IMPORTANT THAT YOU READ THIS INFORMATION REGARDING THE POSSIBLE EF-
FECTS OF ELECTROMAGNETIC INTERFERENCE ON YOUR POWERED WHEELCHAIR.
Electromagnetic Interference (EMI) From Radio wave sources
Powered wheelchairs and motorized scooters (in this text, both will he referred to as powered wheel-
chairs) may be susceptible to electromagnetic interference (EMI), which is interfering electromagnetic
energy (EM) emitted from sources such as radio stations, TV stations, amateur radio (HAM) transmitters,
two-way radios, and cellular phones. The interference (from radio wave sources) can cause the powered
wheelchair to release its brakes, move by itself, or move in unintended directions. It can also permanently
damage the powered wheelchair’s control system. The intensity of the interfering EM energy can be mea-
sured in volts per meter (V/m). Each powered wheelchair can resist EMI up to a certain intensity. This is
called its “immunity level.” The higher the immunity level, the greater the protection. At this time, current
technology is capable of achieving at least a 20 V/m immunity level, which would provide useful protection
from the more common sources of radiated EMI. This powered wheelchair model as shipped, with no fur-
ther modication, has an immunity level of 20 V/m.
There are a number of sources of relatively intense electromagnetic elds in the everyday environment.
Some of these sources are obvious and easy to avoid. Others are not apparent and exposure is unavoid-
able. However, we believe that by following the warnings listed below, your risk to EMI will be minimized.
The sources of radiated EMI can be broadly classied into three types:
1) Hand-held portable transceivers (transmitters-receivers) with the antenna mounted directly on the
transmitting unit. Examples include: citizens band (CB) radios, “walkie talkie,” security, re, and police
transceivers, cellular telephones, and other personal communication devices. NOTE: some cellular
telephones and similar devices transmit signals while they are ON, even when not being used;
2) Medium-range mobile transceivers, such as those used in police cars, re trucks, ambulances, and tax-
is. These usually have the antenna mounted on the outside of the vehicle; and
3) Long-range transmitters and transceivers, such as commercial broadcast transmitters (radio and TV
broadcast antenna towers) and amateur (HAM) radios.
NOTE: Other types of hand-held devices, such as cordless phones, laptop computers, AM/FM radios, TV
sets, CD players, and cassette players, and small appliances, such as electric shavers and hair dryers, so
far as we know, are not likely to cause EMI problems to your powered wheelchair.

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1.5.3. Before Use Each Day
WARNING
● Performthedailychecksbeforeuseeveryday.Makeahabitoutofinspectingthe
wheelchair. Continued use of the wheelchair with a problem in the wheelchair body or the
wheels may cause damage to the wheelchair while traveling, and may result in a rollover or
fall.
● Beforeusingthewheelchaireachday,ensurethat
there is air in the tires. Always keep the air pres-
sure in the rear tires at a normal level. If the air
pressure in the rear tires decreases, the parking
brakes may become ineffective.
● Beforeusingthewheelchaireachday,ensurethat
the anti-tip devices are in the correct position. If
the anti-tip devices are not in the correct position,
the wheelchair could fall backward.
● Beforeusingthewheelchaireachday,checkthe
residual capacity of the battery. If the residual
capacity of the battery is low, the battery may
run out during operation and it may become
impossible to travel in power drive mode.

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1.5.4. Handling the Wheelchair
WARNING
● Ifthewheelchairhaspartsthatarefoldableordetachable,donotoperatethewheelchair
with those parts folded or removed.
● Whenliftingthewheelchair,donotholdmovableparts.
● Donotoperatewithanyheavybaggagehanging
over the backrest, or with any heavy objects in
the compartment. The wheelchair could easily fall
backward on an inclined slope, and may cause
you or people around you to get injured.
● Thewheelchairmaytipoverifitisoperatedwiththeanti-tipdevicesremoved,folded,or
with the safety wheels facing upwards. Be sure to set the anti-tip devices correctly and op-
erate the wheelchair with the safety wheels in the correct position.
● Modifyingtheunitoritsmountingmayadverselyaffectitsperformanceandsafety.Never
make any modifications.
● Donotconnectanyelectricinstrumentstotheplugonthejoystick.Thisplugistoconnect
a PC for the Smart Tune software. Plugging other electric instruments like audio microphone
or earphones may cause unit trouble.
About the Smart Tune software, refer to “11. Wheelchair Disassembly and Adjustment”.
● Donothanganythingonthejoystickonthe
controller. It may get in the way of your operation,
or the weight of the object may prevent the joystick
from returning to its original position, even after
your hand has released it.
In addition, if you put a rubber band around the
joystick, it may get jammed inside the controller,
causing the joystick to not return to its original
position.
In either case, there is a risk of the wheelchair not
stopping.
● Donotreceivemicrowavethermotherapywhile
seated in the wheelchair.
The microwaves may result in drive unit malfunc-
tions, accidental operations and heated metal
parts causing burns.
Switch off the power to motorized wheelchairs
and place them away from microwave thermother-
apy equipment.

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WARNING
● Donotoperatetheclutchleverswhilethewheelchairisinmotion.Thereisariskof
collision or tipping over.
If you switch the clutch levers to the manual position while traveling in power drive, the
motor brake loses its effect and the wheelchair may go out of control.
If you switch the clutch levers to the power drive position while traveling in the manual
drive, brakes are applied to the rear tires. This abrupt braking can cause your body to
plunge forward or damage the wheelchair.
● Removingthebatterywhiletravelingcausesthe
brakes to be applied to the rear tires, and may
cause you or people around you to get injured.
● Turningoffthepowerswitchwhiletraveling
causes the brakes to be applied to the rear tires,
and you or people around you may get injured.
● Whilethewheelchairisbeingoperatedorafter
operation, do not touch the back of the drive units.
During or after operation, the back of the drive
units may be hot. In addition, if the wheelchair is
near a source of heat, the drive units may become
hot.
● Whileoperatingthewheelchair,becarefulnotto
get your hands tangled in the wheel spokes, wheel
holes, etc.
● ThewheelsoftheNAVIGO16″arenotequippedwithhandrims.Whenoperatingthe
NAVIGO16″,donotmanuallydrivethewheelchairbyholdingitsreartiresorwheels.You
may injure yourself.
● Whenmovingpasthedgerowsandtrees,maintainasuitabledistancetopreventtherear
wheels from coming into contact with twigs or other protruding items. If twigs or other
items from hedgerows and trees get caught in the rear wheels when operating the wheel-
chair, it may result in the wheels becoming locked, the clutch lever being knocked into the
manual position, collisions or the wheelchair tipping over.
● Inareaswithanincline,donotswitchtheclutchleverstothemanualposition.Thewheel-
chairmaystartmovingunexpectedly,andmaycollideortipover.

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1.5.5. Getting In/Out of the Wheelchair, Seating
1.5.6. General Operation
● Whengettinginthewheelchairbyyourselfor
when the assistant has the user of the wheelchair
get in the wheelchair, ensure that the wheelchair
is on a level ground. If the user attempts to get in
the wheelchair on an incline, he or she may lose
balance and fall off the wheelchair.
● Neverridethewheelchairwithtwopeople.The
wheelchair may malfunction or the people riding it
may get injured.
● Toswitchtheclutchleverstothemanualposition,suchaswhenstartingassistantop-
erations, apply the parking brakes on a level and stable ground, and then with the power
turned off, switch the clutch levers.
● Neveroperatethewheelchairafterconsumingalcoholortakingmedicinethatcauses
drowsiness.
● Neveroperatethewheelchairwhileholdinganumbrellaorotheritems.
● Nevertowthewheelchair.Donotusethewheelchairtotoworpullanything.
● Ifyouareusingawheelchairwithnoparkingbrakes,havetheassistantholdthewheelchair
to ensure that it does not move. Failure to observe the above may cause the wheelchair to
startmovingunexpectedly,andmayresultinyouorpeoplearoundyoutogetinjured.
● Donotleanoutofthewheelchairtoretrieveanitem.Otherwise,youcouldfalloffthe
wheelchair or the wheelchair could tip over.
WARNING
WARNING

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● Ifyouwanttouseaportablephone,etc.,stopthe
wheelchair at a safe place and turn off the wheel-
chair. Moreover, while traveling in power drive,
keep portable telephones and other electronic
devices turned off. Otherwise, there is a risk of an
accident.
● Donotturnthepowerswitchoffwhiletraveling.It
causes the brakes to be applied to the rear wheels
in some cases and may cause you to fall down
from the wheelchair.
● Donotusethewheelchairfortransportinglug-
gage or for any other purpose than to provide as-
sistance to a disabled person.
● Donotoperatethewheelchairnearadevicethatproducesstrongradiowaves.Ifthewheel-
chair is near a source of radio waves and starts to operate abnormally, immediately turn
off the power, and quickly move away from that location using the assistant operations or
manual operation.
The weak electromagnetic waves emitted by the NAVIGO may affect other electronic devic-
es, such as automatic doors and the anti-theft systems of stores. In this case, turn off the
power and operate the wheelchair using the assistant operations or manual operation.
WARNING
Power
switch
o󰀨

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● Donotridewithclothingthatisunsafeforwheelchairs,suchasshownbelow.Ifyoudrive
with such clothing, you or other people around you may get injured.
Long scarves
Pants/skirts with wide hems
Clothing with loose sleeves
Bare feet, sandals, slippers,
ill-tting footwear, etc.
WARNING

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In the following environments and situations, you may need an assistant to accompany you and to oper-
ate the wheelchair for you.
In such cases, have an assistant accompany you. Traveling alone in these situations may lead to injury.
Moreover, check to see if any dangers such as those shown below exist in the roads you use on a daily
basis. If so, select a route that does not pass through such areas.
Always check the surrounding conditions to ensure safety.
1.5.7. Operation on Public Roads
● Whenthewheelchairisoperatedoutdoors,itslegalstatusisthatofapedestrian.Make
sure to adhere to the rules and manners of a pedestrian.
● Ongeneralroads,becarefulofautomobiles,bicycles,andpedestrians.Besureyourdonot
run into pedestrians.
● Althoughthewheelchaircanbeoperatedonpedestrian-onlyroads,itcannotbeoperated
where pedestrians are not allowed (car roads, in the middle of a road, etc.).
● Iftheroadhasasidewalk,operatethewheelchaironthesidewalk.
● Iftheroaddoesnothaveasidewalk,operatethewheelchaironthesidestripoftheroad
where pedestrians walk.
● Iftheroaddoesnothaveasidestrip,operatethewheelchaironthesideoftheroadwhere
pedestrians walk.
● Iftwoormorewheelchairsaretravelingtogetheroutdoors,thewheelchairsshouldbeoper-
ated in a single line with sufficient space between the wheelchairs. The wheelchairs should
not be operated side by side.
● Itisextremelydangeroustotravelonanarrowstreetwithoutasidewalk.Chooseasafer
path whenever possible.
● Whenstartingofformovingbackward,becarefulofotherpeopleandobstaclesaround
you.
WARNING
● Becarefulnottotraveltooclosetotheedgewhen
traveling on an embankment, etc., of a road. De-
pending on the condition of the shoulder of the
road, you could accidentally move off the road.
● Whentravelingonasidewalkthatdoesnothaveaguardrail,thereisariskoffallinginto
the street side. Have an assistant accompany you instead of traveling alone.

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1.5.8. Operation on Slopes
The wheelchairs equipped with the NAVIGO are built to be lighter compared to other heavier
electric wheelchairs that use a heavier general lead battery. For this reason, when a person
sitsinit,theoverallcenterofgravitymaybedi󰀨erent.Therefore,usecautionwhentraveling
on a slope.
● Whengoingup/downaparticularslopeforthefirsttime,haveanassistantaccompanyyou
to ensure safety.
● Donotusethewheelchaironaslopesteeperthan
6 degree (10% grade). It may tip over or the brake
may become ineffective.
WARNING
● Ifanoncomingvehicleisnear,stopthewheelchair,waitforthevehicletopass,andthen
check in front of you and behind you for safety before proceeding.
● Donotoperatethewheelchairoutdoorsatnight.
Not being able to see the road conditions, you
may lose balance and fall, or people or cars may
collide into you if they cannot recognize you.
● Ifitisrainingorsnowing,donotoperatethewheelchairoutdoors.Automobilesandother
vehicles may collide into you if they cannot recognize you. If it starts to rain or snow while
you are outdoors, move indoors as soon as possible.
WARNING
Over 6°
● Whentravelingnearaditch,thetiremayfallintoitifthereisagapevenifitiscovered.
Have an assistant accompany you instead of traveling alone.
● Ifthereareanyobstacles,stopthewheelchairandcheckinfrontofyouandbehindyoufor
safety before proceeding.